Vulnerability Description
LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit message) returned by the admin-configurable Oxidized integration URL (oxidized.url) into the device showconfig page without applying htmlspecialchars(). An administrator who points the Oxidized URL at an attacker-controlled server (SSRF) can cause it to return malicious JSON, resulting in stored/persistent cross-site scripting affecting all users who view any device's showconfig tab. Fixed in 26.7.0.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j
- https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-oxidi
- https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j
FAQ
What is CVE-2026-84189?
CVE-2026-84189 is a vulnerability with a CVSS score of 8.1 (HIGH). LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit message) returned by the admin-configurable Oxidized integration URL (oxidized.url) into the device showconfig page without...
How severe is CVE-2026-84189?
CVE-2026-84189 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-84189?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.